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    <title>Vector Formats</title>
    <link rel="stylesheet" href="../theme/default/style.css" type="text/css">
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    <style type="text/css">
        input, select, textarea {
            font: 0.9em Verdana, Arial, sans-serif;
        }
        #leftcol {
            position: absolute;
            top: 0;
            left: 1em;
            padding: 0;
            width: 517px;
        }
        #map {
            width: 512px;
            height: 225px;
            border: 1px solid #ccc;
        }
        #input {
            width: 512px;
        }
        #text {
            font-size: 0.85em;
            margin: 1em 0 1em 0;
            width: 100%;
            height: 10em;
        }
        #info {
            position: relative;
            padding: 2em 0;
            margin-left: 540px;
        }
        #output {
            font-size: 0.8em;
            width: 100%;
            height: 512px;
            border: 0;
        }
        p {
            margin: 0;
            padding: 0.75em 0 0.75em 0;
        }
    </style>
    <script src="../lib/Firebug/firebug.js"></script>
    <script src="../lib/OpenLayers.js"></script>
    <script type="text/javascript">
        var map, vectors, formats;
        function updateFormats() {
            var in_options = {
                'internalProjection': map.baseLayer.projection,
                'externalProjection': new OpenLayers.Projection(OpenLayers.Util.getElement("inproj").value)
            };   
            var out_options = {
                'internalProjection': map.baseLayer.projection,
                'externalProjection': new OpenLayers.Projection(OpenLayers.Util.getElement("outproj").value)
            };
            var gmlOptions = {
                featureType: "feature",
                featureNS: "http://example.com/feature"
            };
            var gmlOptionsIn = OpenLayers.Util.extend(
                OpenLayers.Util.extend({}, gmlOptions),
                in_options
            );
            var gmlOptionsOut = OpenLayers.Util.extend(
                OpenLayers.Util.extend({}, gmlOptions),
                out_options
            );
            var kmlOptionsIn = OpenLayers.Util.extend(
                {extractStyles: true}, in_options);
            formats = {
              'in': {
                wkt: new OpenLayers.Format.WKT(in_options),
                geojson: new OpenLayers.Format.GeoJSON(in_options),
                georss: new OpenLayers.Format.GeoRSS(in_options),
                gml2: new OpenLayers.Format.GML.v2(gmlOptionsIn),
                gml3: new OpenLayers.Format.GML.v3(gmlOptionsIn),
                kml: new OpenLayers.Format.KML(kmlOptionsIn),
                atom: new OpenLayers.Format.Atom(in_options),
                gpx: new OpenLayers.Format.GPX(in_options)
              }, 
              'out': {
                wkt: new OpenLayers.Format.WKT(out_options),
                geojson: new OpenLayers.Format.GeoJSON(out_options),
                georss: new OpenLayers.Format.GeoRSS(out_options),
                gml2: new OpenLayers.Format.GML.v2(gmlOptionsOut),
                gml3: new OpenLayers.Format.GML.v3(gmlOptionsOut),
                kml: new OpenLayers.Format.KML(out_options),
                atom: new OpenLayers.Format.Atom(out_options),
                gpx: new OpenLayers.Format.GPX(out_options)
              } 
            };
        }
        function init(){
            map = new OpenLayers.Map('map');
            var wms = new OpenLayers.Layer.WMS( "OpenLayers WMS",
                "http://vmap0.tiles.osgeo.org/wms/vmap0?", {layers: 'basic'});

            vectors = new OpenLayers.Layer.Vector("Vector Layer");

            map.addLayers([wms, vectors]);
            map.addControl(new OpenLayers.Control.MousePosition());
            map.addControl(new OpenLayers.Control.EditingToolbar(vectors));

            var options = {
                hover: true,
                onSelect: serialize
            };
            var select = new OpenLayers.Control.SelectFeature(vectors, options);
            map.addControl(select);
            select.activate();
            
            updateFormats();

            map.setCenter(new OpenLayers.LonLat(0, 0), 1);
        }

        function serialize(feature) {
            var type = document.getElementById("formatType").value;
            // second argument for pretty printing (geojson only)
            var pretty = document.getElementById("prettyPrint").checked;
            var str = formats['out'][type].write(feature, pretty);
            // not a good idea in general, just for this demo
            str = str.replace(/,/g, ', ');
            document.getElementById('output').value = str;
        }

        function deserialize() {
            var element = document.getElementById('text');
            var type = document.getElementById("formatType").value;
            var features = formats['in'][type].read(element.value);
            var bounds;
            if(features) {
                if(features.constructor != Array) {
                    features = [features];
                }
                for(var i=0; i<features.length; ++i) {
                    if (!bounds) {
                        bounds = features[i].geometry.getBounds();
                    } else {
                        bounds.extend(features[i].geometry.getBounds());
                    }

                }
                vectors.addFeatures(features);
                map.zoomToExtent(bounds);
                var plural = (features.length > 1) ? 's' : '';
                element.value = features.length + ' feature' + plural + ' added';
            } else {
                element.value = 'Bad input ' + type;
            }
        }

        // preload images
        (function() {
            var roots = ["draw_point", "draw_line", "draw_polygon", "pan"];
            var onImages = [];
            var offImages = [];
            for(var i=0; i<roots.length; ++i) {
                onImages[i] = new Image();
                onImages[i].src = "../theme/default/img/" + roots[i] + "_on.png";
                offImages[i] = new Image();
                offImages[i].src = "../theme/default/img/" + roots[i] + "_on.png";
            }
        })();

    </script>
  </head>
  <body onload="init()">
    <div id="leftcol">
        <h1 id="title">Vector Formats Example</h1>

        <div id="tags">
            vector, geojson, atom, kml, georss, gml, wkt, advanced, spherical, mercator
        </div>
        <p id="shortdesc">
            Shows the wide variety of vector formats that open layers supports.
        </p>

        <div id="map" class="smallmap"></div>
        <div id="input">
            <p>Use the drop-down below to select the input/output format
            for vector features.  New features can be added by using the drawing
            tools above or by pasting their text representation below.</p>
            <label for="formatType">Format</label>
            <select name="formatType" id="formatType">
                <option value="geojson" selected="selected">GeoJSON</option>
                <option value="atom">Atom</option>
                <option value="kml">KML</option>
                <option value="georss">GeoRSS</option>
                <option value="gml2">GML (v2)</option>
                <option value="gml3">GML (v3)</option>
                <option value="wkt">Well-Known Text (WKT)</option>
                <option value="gpx">GPX</option>
            </select>
            &nbsp;
            <label for="prettyPrint">Pretty print</label>
            <input id="prettyPrint" type="checkbox"
                   name="prettyPrint" value="1" />
            <br>
            Input Projection: <select id="inproj" onchange='updateFormats()'>
              <option value="EPSG:4326" selected="selected">EPSG:4326</option>
              <option value="EPSG:900913">Spherical Mercator</option>
            </select> <br> 
            Output Projection: <select id="outproj" onchange='updateFormats()'>
              <option value="EPSG:4326" selected="selected">EPSG:4326</option>
              <option value="EPSG:900913">Spherical Mercator</option>
            </select> 
            <br> 
            <textarea id="text">paste text here...</textarea>
            <br>
            <input type="button" value="add feature" onclick="deserialize();" />
        </div>

        <div id="docs">
        </div>

    </div>
    <div id="info">
        <p>Use the tools to the left to draw new polygons, lines, and points.
        After drawing some new features, hover over a feature to see the
        serialized version below.</p>
        <textarea id="output"></textarea>
    </div>

  </body>
</html>
